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Hello all,

I am trying to build a beehive scale for a friend using OpenScale and OpenLog.
As there is no constant power source near the beehives, I plan to enable OpenScale's serial trigger option to save batteries and to use RTC (DS3231) as a trigger device.
But, as a beginner, I couldn't figure out how to attach the RTC to OpenScale.

According to the following site, it needs four lines. i.e. VCC, GND, SDA and SCL. ... -tutorial/

For VCC and GND, I may be able to use 5V and GND for the external temperature sensor as I won't use it (for now at least), but where should I solder SDA and SCL?

I googled various keywords (openscale, i2c, atmega328p, sda, scl, ...), but couldn't find any similar example or relevant information.
Does anyone have advice or link to a similar usage?
Or am I doing it the wrong way?

Thank you!